Writing and Evaluating Algebraic Expressions Using a Table

This video tutorial teaches how to write and evaluate algebraic expressions using a table. It emphasizes the importance of following the order of operations, commonly remembered as PEMDAS, to avoid mistakes. The lesson uses a real-world scenario where Tom saves half his earnings and pays $5 for parking to demonstrate the application of algebraic expressions. A function table is used to evaluate different values of Tom's earnings, reinforcing the concept of substitution. The tutorial concludes by summarizing the key points and the purpose of using expressions to represent variable values.

What is the correct order of operations to follow when evaluating an expression?

• Multiply, Divide, Add, Subtract, Parentheses, Exponents

• Parentheses, Exponents, Multiply, Divide, Add, Subtract

• Add, Subtract, Multiply, Divide, Parentheses, Exponents

• Exponents, Parentheses, Multiply, Divide, Add, Subtract

In the expression 5X, what does the X represent?

• The number 5

• A variable that can be any number

• A constant value

• The number 10

If Tom's weekly earnings are represented by M, what does the expression 'half M - 5' calculate?

• Tom's total earnings

• Tom's savings

• Tom's spending money after savings and parking fees

• Tom's parking fees

How much spending money does Tom have if his weekly earnings are $60?

• $20

• $30

• $25

• $35

What is the purpose of using a function table in evaluating expressions?

• To calculate the exact value of a variable

• To eliminate the need for substitution

• To allow the variable to take on different values depending on the situation

• To simplify the expression